The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X175-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø80mm bore, 175mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X175-20S is an 80 mm bore double-acting single-rod cylinder with a field-adjustable stroke end, giving you up to 20 mm of fine-tuning range on the rear cap. At 0.5 MPa it delivers 2513 N push and 2268 N pull, using a 25 mm diameter piston rod and PT3/8 ports. The built-in magnet (S suffix) lets you clamp CMSG/DMSG/EMSG sensors directly onto the tie-rod barrel for reliable end-of-stroke detection.
With a 175 mm nominal stroke and a 28 mm air cushion, this cylinder is designed for applications where the stop position needs dialling in during commissioning or format changes. The SCJ body length A is 239 mm, making it a compact adjustable solution for medium-duty automation tasks that require sensor feedback without adding external brackets.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X175-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 20 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×175 | Nominal (maximum) stroke length in mm. |
| -20 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The 20 mm rear adjuster lets technicians dial in the exact end-stop position during machine commissioning, eliminating the need to shim or reposition the cylinder body.
The built-in magnet works with CMSG/DMSG sensors to confirm the piston has reached the adjusted stroke end, providing a clean signal for PLC sequence control in automated cells.
In high-cycle clamping or pressing fixtures, the screw can be advanced to compensate for pad wear or tooling creep, maintaining consistent clamp force without reprogramming.
Choose the SCJ80X175-20S when you need to fine-tune the stroke end position on the machine without swapping cylinders. If your force requirement is lower, the 63 mm bore SCJ offers 1559 N push at 0.5 MPa; for heavier loads, step up to the 100 mm bore at 3927 N. Because the nominal stroke is 175 mm, rod buckling is not a primary concern in standard mounting, but ensure the load is guided if side forces are present.
For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with 80 mm bore, 175 mm nominal stroke, 20 mm adjust range, PT3/8 ports, basic mounting, and the -S magnet. If you do not need the stroke-end adjustability, the fixed-stroke SC80X175-S is the equivalent non-adjustable model.
Adjustable-stroke checklist
At 0.5 MPa air pressure, the push force is 2513 N and the pull force is 2268 N (the difference is due to the 25 mm single rod). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 513 kgf.
Mechanically, an SC80X175-S will fit the same mounting and port connections, but you lose the 20 mm rear adjusting screw. If your process requires fine-tuning the stroke end position without moving the cylinder body, the SCJ adjustable-stroke version is the correct choice.
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